Work holding device

ABSTRACT

Work holding device or vise with a base, fixed and movable work engaging surfaces or jaws, and dual means - fluid-pressure actuated and manually actuated - for positioning the jaws relative one to the other.

United States Patent [1 1 Csatlos WORK HOLDING DEVICE Geza M. Csatlos, Wadsworth, Ohio Karg Machine Products, Inc., Tallmadge, Ohio Aug. 4, 1971 Inventor:

Assignee:

Filed:

Appl. No.2

US. Cl. 269/32, 269/157 Int. Cl B23q 3/08 Field of Search 269/20, 24, 25, 27,

References Cited UNITED STATES PATENTS 2,708,381 5/1955 Olson 269/32 Aug. 14, 1973 Primary Examiner-Harold D. Whitehead Assistant Examiner-Joseph T. Zatarga Attorney-Mack D. Cook, ll

ABSTRACT Work holding device or vise with a base, fixed and 2 Claims, 2 Drawing Figures PATENTEU MIC 14 I813 SHEEI 1 0F 2 w R L W Z m M A Z E 6 ATTORNEY Pmmmwmms 3.752.464

SHEET 2 BF 2 INVENTOR. GEZA M. CSATLOS ATTORNEY BACKGROUND OF THE INVENTION The present invention relates to an improved work holding device generically, a vise that is particularly suited for use with a work performing apparatus generically, a machine tool.

The prior art has known vises in many forms. The traditional bench vise is relatively simple using fixed and movable jaws with serrated work engaging surfaces or jaw plates moved relative one to the other by a handle operated screw. Machine tool vises have been both manually actuated or fluid-pressure actuated to provide the necessary force for holding a work-piece in relation to a work performing tool.

However, the art relating to the subject matter of the present invention has not known a relatively simple and uncomplex device combining in an efficient and trouble free manner dual means fluid pressure actuated and manually actuated for adjustably holding and firmly clamping a work piece in relation to a work performing tool SUMMARY OF THE INVENTION The object of the invention is to provide an improved work holding device or vise that is particularly suited for use with a machine tool.

A further'object is to provide a work holding device or vise wherein the work engaging surfaces are initially positioned by manually actuated means and thereafter brought into clamping engagement with a work piece by fluid-pressure actuated means.

A still further object is to provide a work holding device with dual actuation means so that persons need not possess great physical strength when accurately andprecisely positioning a work piece in relation to a work performing tool.

Still further, it is an object to utilize a short stroke and therefore relatively low cost fluid-pressure actuated means to provide a very high clamping force over an extremely wide range of work piece sizes.

These and other objects of the invention, and the advantages thereof, will be apparent in view of the Description of the Preferred Embodiment as set forth. below.

In general, a work holding device according to theinvention has a base adapted to be positioned relative to a work performing apparatus. The device has opposed relatively movable work engaging surfaces, one I member, the slide member being positioned between the stanchion and the movable work engaging surface. The actuating shaft extends away from the slide member and through the stanchion and terminates in a free end. Between the free end and the stanchion the actuating shaft carries a hollow piston. The piston is received within an annular cylinder positioned coaxially around the actuating shaft by mounting means extending axially of the stanchion. The piston and cylinder provide or constitute fluid-pressureactuated means for selective sliding movement of the actuating shaft through the stanchion. The free end of the actuating shaft, adapted to receive a handle or wrench, provides or constitutes manually actuated means for selective rotational movement of the actuating shaft in the stanchion. In use of the device, the manually actuated means positions the work engaging-surfaces in close proximity to a work piece. Thereafter, the fluidpressure actuated means firmly clamps the work piece.

DESCRIPTION OF THE DRAWINGS indicated on line 2-2 of FIG. 1, showing the work engaging surfaces clamping a work piece.

DESCRIPTION OF THE PREFERRED EMBODIMENT A work holding device according to the invention is indicated generally by the numeral 10. This device 10 has a base 11 which may have a precision formed under surface 12 and suitable attachment areas for positioning the device 10 relative to a work performing apparat'us such as a machine tool (not shown).

The device 10 has opposed relatively movable'work engaging surfaces or replaceable jaws, l4 & 15. The stationary jaw 14 may be secured rigidly to the base 11 as by attachment to a mounting boss 16. The movable jaw 15 is attached to a slide element 17. The slide element 17 is a generally rectangular block. The under surface of element 17 has depending guide keys 18 securely but slidably received within elongated guide ways 19' in the base 11. The slide member 17 has a medial interiorly threaded bore 20 therein. An elongated actuating, shaft 22 with an end having a mating exterior thread is rotatably inserted into the bore 20.

There is astanchion 24 on the base 11', for rotatably: and slidably holding the actuating shaft 22 in axial alighment with the bore 20. The actuating shaft 22 extends away from. the slide member 17 and through the stanchion 24' and terminates in a free end 25 adapted to receive a handle or wrench.

Between the free. end 25 and the stanchion 24, the actuating shaft 22- carries a hollow piston 26. The pis ton 26 ispositioned on the shaft as by a collar 27. The piston 26. is received in a fluid-pressure transmitting'relation within an annular cylinder28. The cylinder 28 is fixed and positioned coaxially around the actuating shaft 22; by amounting collar 29. The mounting collar 29 is positioned axially of the stanchion 24 as by bolt" attached spacers 30.

Whenv fluid-pressure from a remote source (not shown) is introduced" into the cylinder 28 the piston'2i6 will be energized to axially. move or slide: the actuating shaft ZZandthe-slide-element 1.7 and the jaw ls-toward the fixed jaw 14. Asshown, the piston 26 is single-' acting" with the fluid pressure being valved into eynn: der '28 in. a: two-way, supply-exhaust cycle. In this embodiment, a coiled compression spring 31 carried around-the actuating shaft 22 between the stanchion-'24 andthe collar 27'will provide the necessary force torelease the clamping force on the work piece when the piston'26 is de-energized. The fluid pressure actuating means 26 & 28 may also be double-acting," requiring a four-way valve but dispensing with the spring 3!. In either embodiment, the piston and cylinder should be short stroke" and therefore relatively low cost, while providing a very high clamping force over an extremely wide range of work piece (WP) sizes.

What is claimed is:

1. in a work holding device with a base, fixed and movable work engaging jaws, and dual means, fluidpressure actuated and manually actuated, for positioning the jaws relative one to the other, the combination of, a slide member on said base carrying said movable jaw and having an interiorly threaded bore therein, an elongated actuating shaft with an end having a mating exterior thread rotatably inserted into said slide member bore, a stanchion on said base for rotatably and slidably holding said actuating shaft in axial alignment with said slide member bore, said actuating shaft extending away from said slide member and through the stanchion and terminating in a free end adapted to receive a handle, a hollow piston on said actuating shaft between said free end and said stanchion, said piston being received in a fluid-pressure transmitting relation within an annular cylinder, a mounting collar for positioning said cylinder coaxially around said shaft, and means for positioning said mounting collar axially of said stanchion.

2. A work holding device according to' claim 1, wherein a coiled compression spring is positioned between said piston and said stanchion coaxially around said actuating shaft. 

1. In a work holding device with a base, fixed and movable work engaging jaws, and dual means, fluid-pressure actuated and manually actuated, for positioning the jaws relative one to the other, the combination of, a slide member on said base carrying said movable jaw and having an interiorly threaded bore therein, an elongated actuating shaft with an end having a mating exterior thread rotatably inserted into said slide member bore, a stanchion on said basE for rotatably and slidably holding said actuating shaft in axial alignment with said slide member bore, said actuating shaft extending away from said slide member and through the stanchion and terminating in a free end adapted to receive a handle, a hollow piston on said actuating shaft between said free end and said stanchion, said piston being received in a fluid-pressure transmitting relation within an annular cylinder, a mounting collar for positioning said cylinder coaxially around said shaft, and means for positioning said mounting collar axially of said stanchion.
 2. A work holding device according to claim 1, wherein a coiled compression spring is positioned between said piston and said stanchion coaxially around said actuating shaft. 